Speed regulating device for material discharge apparatus

ABSTRACT

A device for regulating the speed of an auger utilized to deliver grain or similar particulate material from one location to another. A motor driven, constant speed shaft carries a concentric disk which rotates with the shaft and which is tiltable relative to the axis of the shaft. A pair of reciprocal drive couplers is connected to the shaft of the auger and is utilized for imparting one-directional rotative movement to the auger. A pair of rocker arms is operatively connected between the drive couplers and the disk carried by the drive shaft. Each rocker arm has one end connected to a drive coupler and its opposite end resting upon one side face of the disk. Rotation of the disk when in a tilted position causes oscillatory movement of the rocker arms and the resulting actuation of the drive couplers, which in turn cause rotative movement of the auger. The disk carried by the drive shaft is designed so as to be adjustably tiltable relative to the axis of the drive shaft. By varying the tilt of the disk, the extent of oscillatory movement or swing of the rocker arms may be varied and the speed of the auger correspondingly changed.

United States Patent Ewell [54] SPEED REGULATING DEVICE FOR [52] US. Cl. ..222/l34, 74/123, 74/125, 198/64 [51] Int. Cl. ..B67d 5/60 [58] Field of Search ..74/54, 839, 112, 122, 123, 74/125.5; 222/134; 198/64 [56] References Cited UNITED STATES PATENTS 2,629,548 2/1953 Miller ..74/123 X 3,176,878 4/1965 Hobgood et al. ..222/l34 Primary Examiner-Stanley H. Tollberg Attorney-Eugene C. Knoblock et al.

[451 Dec. 26, M72

[57] ABSTRACT A device for regulating the speed of an auger utilized to deliver grain or similar particulate material from one location to another. A motor driven, constant speed shaft carries a concentric disk which rotates with the shaft and which is tiltable relative to the axis of the shaft. A pair of reciprocal drive couplers is connected to'the shaft of the auger and is utilized for imparting one-directional rotative movement to the auger. A pair of rocker arms is operatively connected between the drive couplers and the disk carried by the drive shaft. Each rocker arm has one end connected to a drive coupler and its opposite end resting upon one side face of the disk. Rotation of the disk when in a tilted position causes oscillatory movement of the rocker arms and the resulting actuation of the drive couplers, which in turn cause rotative movement of the auger. The disk carried by the drive shaft is designed so as to be adjustably'tiltable relative to the axis of the drive shaft. By varying the tilt of the disk, the extent of oscillatory movement or swing of the rocker arms may be varied'and the speed of the auger correspondingly changed.

15 Claims, 9 Drawing Figures PATENTED B m2 3.707.246 SHEET 1 [IF 5 INVENTOR. EDGAR C. EWELL.

PATENTED W325 3.707246 SHEET 3 BF 5 1N VENTOR.

A TTORNEYS EDGAR C. FWELL SPEED REGULATING DEVICE FOR MATERIAL DISCHARGE APPARATUS BACKGROUND OF THE INVENTION This invention relates to an adjustable speed regulating device for a material discharging means, such as a material transporting belt or auger, and will find application in automatic proportioning apparatus for the mixing of grain which is utilized as feed for livestock and similar animals.

Devices for automatically proportioning grain and other food items in the preparation of feed for farm animals have been used for several years. In devicesof this nature a plurality of bins are provided for each grain or food constituent. Each bin discharges into an area where material discharging means serves to transportthe grain or other food item to a mill where the materials from the various bins are collected and generally ground into a mixture. The feed mixture is then transported to a trough area for immediate use or to a storage area for later use. The amount of each grain or other food item constituent of the feed mixture is determined by the discharge rate of the material discharging means associated with each bin. As described in U. S. Pat. No. 2,970,532, it has been customary to regulate the operating times of each individual material discharging means to proportion the grain which is delivered to the mixing and grinding area of the apparatus. In U. S. Pat. No. 3,176,878 the speed of each material discharging means is regulated to proportion the grain which is delivered to the mixing and grinding area of the apparatus. In this last mentioned patent, the speed regulation of each discharging means is accomplished by adjusting the throw of the crank used to actuate the discharging means;

In this invention, like U. S. Pat. No. 3,l76,878, the discharge rate of each material discharging means is regulated by varying the speed of its operation. But, unlike the above discussed prior art, a crank is not used to actuate each material discharging means.

SUMMARY OF THE INVENTION This invention relates to an adjustable speed regulating device for a material discharging means, such as a conveyor belt or auger. A drive shaft which is preferably driven at a selected constant rate of speed is I provided for powering one or more material discharging means. A disk for each discharging means is concentrically carried by the drive shaft for rotation therewith. Each disk includes a side face with defines a cam surface. A pair of reciprocal drive couplers is carried by each material discharging means and is utilized for imparting one-directional rotative movement to the connected discharging means. A pair of pivotal rocker arms is provided for each discharging means. Means is provided for connecting one end of each rocker arm to a drive coupler which, upon oscillatory movement ofits connected rocker arm, causes actuation of the drive coupler and resulting rotation of the material discharging means associated with it. The speed of rotation of each material discharge means is dependent upon the extent of the oscillatory movement or swing of its associated rocker arms. Each disk carried by the drive shaft is designed so that it and its cam-defining side face can be tilted relative to the axis of the drive shaft. The opposite ends of each pair of the rocker arms define cam followers which ride upon the cam surface of a disk. Means is provided for selectively tilting each disk to thereby vary the extent of movement of the rocker arms in contact with the disk.

Accordingly, it is an object of this invention to provide a speed regulating device fora material discharging means which is of economical construction, having few moving parts and of simple maintenance.

Another object of this invention is to provide an adjustable speed regulating device for a material discharging means, such as an auger or a conveyor belt, in which the discharge rate of discharging means is determined by the speed thereof.

Still another object of this invention is to provide means for regulating the individual speeds of a plurality of rotarymaterial discharging meansin a proportionlng device for the mixing and grinding of animal feed.

Still another object of this invention is to provide means for individually controlling the speed of a plurality of rotary material discharging means when driven by a constant speed power source.

Other objects of this invention will become apparent upon a reading of the inventions description.

BRIEF DESCRIPTION OF THE DRAWINGS A preferred embodiment of this invention has been chosen for purposes of illustration and description wherein:

FIG. 1 is a side elevational view of a proportioned mixing and grinding apparatus for animal feed shown with parts thereof broken away for purposes of illustration, and incorporating the speed regulating device of this invention therein.

FIG. 2 is a rear elevational view of the mixing and grinding apparatus of FIG. 1 shown with parts broken away for purposes of illustration.

FIG. 3 is a fragmentary perspective view of that portion of the mixing and grinding apparatus seen from line 3-3 of FIG. 1 with parts thereof broken away to illustrate the speed regulating device of this invention.

FIG. 4 is an enlarged perspective view of the speed regulating device of this invention shown connected to an auger. I

FIG. 5 is an enlarged front elevational view of the regulating device as seen from line 5-5 of FIG. 4.

FIG. 6 is a sectional view of the regulating device taken along line 6-6 of FIG. 5.

FIG. 7 is a sectional end view of the regulating device taken along line 77 of FIG. 5.

FIG. 8 is an enlarged fragmentary sectional view of a drive coupler of the regulating device taken along line 8-8 of FIG. 6 and having parts broken away for purposes of illustration.

FIG. 9 is a perspective view shown in exploded form of the tiltable disk and associated components of the regulating device of this invention.

A DESCRIPTION OF THE PREFERRED EMBODIMENT The preferred embodiment illustrated is not intended to be exhaustive or to limit the invention to the precise form disclosed. It is chosen and described in order to best explain the principles of the invention and its application and practical use to thereby enable others skilled in the art to best utilize the invention.

The speed regulating device of this invention is illustrated as a component of a mixing and grinding apparatus 5 for particulate material. Apparatus 5 includes a material mixing and grinding area which is connected by a common chute 12 to a plurality of overhead hoppers 14. A conventional hammermill 16 is located within grinding andmixing area 10 and is driven by a suitable electricmotor 18. As the particulate material, which may comprise grain or other food material for animals, is mixed and ground within area 10 by hammermill 16, it falls into a lower trough 20. An auger 22 powered by a suitable drive motor (not shown) transpor ts the ground and mixed material from trough to an adjacent receiving or storage area. The mixing and grinding apparatus 5 includes a control box 24 which serves to regulate the operation of drive motor 18 and other motors associated with the components of the apparatus. Control box 24 preferably includes a timer which regulates the over-all operation time of the apparatus.

A conduit 26 opens into each hopper l4 and is connected to overhead bins (not shown) which contain various material constituents. Suitable control means may be provided for regulating the flow of particulate material from the bins into hoppers 14 so as to maintain a certain level of particulate material within each hopper. An auger 28 is positioned within each hopper 14. Each auger 28 serves upon rotation to urge the material in its hopper 14 upwardly over lip 30 of the hopper, down chute 12 and into the grinding and mixing area 10 of the apparatus. This invention relates to means for regulating the material discharge rate of the respective augers 28 in hoppers 14. It is to be understood that this regulating means would have application not only to augers' but also to conveyor belts and similar material discharging means.

A housing part 32, as best seen in FIG. 3, is secured to the front side of hoppers 14 and extends from one end to the other end of the hoppers. A drive shaft 34 is suitably journalecl within housing part 32. Shaft 34 is positioned so as to extend transversely of shafts 36 of augers 28. An electric drive motor 38, as seen in FIG. 2, is connected by suitable belt and pulley means 40 to shaft 34 and serves, preferably, once grinding has started, to rotate shaft 34 at a selected substantially constant speed. Each auger 28 is drive-connected to shaft 34 through the regulating device of this invention, designated by the reference numeral 39 and generally as illustrated in FIGS. 4-9. In the bank of augers 28 of apparatus 5 there will be one regulating device 39 for each auger, with all the regulating devices being associated with single drive shaft 34. if a conveyor belt is used as the material discharging means, the regulating device will connect the shaft of the belts drive roller to shaft 34.

A description of regulating device 39 is as follows. A collar 42 is fixedly secured to drive shaft 34, such as by a set screw 44. A disk 46 having a central opening 48 therein is fitted onto shaft 34. The fit between shaft 34 and disk 46 is loose so as to permit the disk to assume an inclined angle of preferably between 20 and degrees relative to the shaft axis. Disk 46 carries an ear 50 which is fitted within a circumferential slot 52 in collar 42. A pin 54 is pressed into collar 42 at slot 52 and extends with clearance through a bore 56 in disk ear 50 so as to pivotally connect the disk to collar 42 and permit the angle between disk 46 and the shaft axis to vary between 90 and preferably at least 45 degrees. A collar 58 is also carried by shaft 34 at the opposite side of collar 42 from disk 46. Collar 58 is shiftable along shaft 34 and carries pins 60 which extend with clearance through'bores 61 in collar 42 and which abut the inner face 62 of disk 46. A thrust bearing member 64 is also carried by shaft 34 at the opposite side of collar 58 from collar 42. Thrust bearing member 64 is shiftable as a unit along shaft 34 and includes an inner race part 66 and an outer'race part 68. Inner race part 66 abuts collar 58 and is preferably rotatable with collars 42 and 58. A cam 70 is connected to one end of a shaft 72 which is journaled in housing part 32. Cam 70 engages outer racepart 68 of bearing member 64 and upon rotation causes collar 58 andbearing member 64 to be shifted along shaft 34 relative to collar 42. A dial knob 74 is connected to the opposite end of shaft 72 and is located at' front face 76 of housing part 32 where it can be grasped'and turned to rotate cam 70.

End portion 78 of the adjacent auger shaft 36 extends across housing part 32 and is journaled within suitable bearings 80. A pair of overrunning clutches 82 or similar reciprocal drive coupler means is carried by auger end portion 78. Clutches 82, which may be of the roller type manufactured by The Torrington Company of Torrington, Connecticut, are positioned so as to cause rotation of auger shaft 36 in one direction only when the clutches are each rotated in the desired direction of rotation of the auger. When clutches 82 are rotated in the opposite'direction from the desired direction of rotation of the auger, overrunning or nondriving movement of the clutches relative to shaft 36 takes place. Each clutch 82 is drive-connected to one end of an arm 84. A pair of rocker arms 86 are journaled upon a shaft 88 located transversely within housing part 32. Each arm 86 includes end portions 90 and 92 which extend oppositely outwardly from the pivot connection of the arms to shaft 88. Each rocker arm end portion '92 is connected by a link 94 to the free end of a clutch-connected arm 84. The other end portion 90 of each rocker arm 86 preferably carries a roller 96.

As best illustrated in FIG. 7, rollers 96 are positioned at opposite sides of shaft 34 and engage in rolling contact diametrically located marginal parts of the outer face 98 of disk 46. Thus, outer face 98 of the disk preferably defines a cam surface with rollers 96 serving as cam follower members. A helical spring 100, which is preferably at all times in tension, extends between each pair of link-connected arms 84 and 86 with one end of the spring being connected to arm 84 adjacent the connection of link 94 thereto and with the other end of the spring being connected to end portion 90 of the rocker arm 86 spaced from rocker arm shaft 88. Each spring 100 serves to urge roller 96 of its connected arm 86 into contact with outer face 98 of disk 46 at all times during operation of the regulating means 39.

A description of the operation of regulating device 39 is as follows. Rotation of dial knob 74 causes shiftable movement of thrust bearing member 64 and a corresponding movement of collar 58 longitudinally of shaft 34 and relative to collar 42. As collar 58 moves relative to collar 42, pins 60 carried by collar 58 cause pivotal movement of disk 46 about pin 54, thereby changing the included angle between outer face 98 of the disk and the axis of shaft 34. As shaft 34 turns, disk 46 rotates with the shaft, and experiences a wobbling action. This wobbling action of disk 46 causes reciprocative or oscillatory movement of each rocker arm 86 with a corresponding reciprocative movement of the clutch-connected arms 84 connected by links 94 to the rocker arms. Movement of one pair of link-connected arms 84 and 86 is opposite in direction to the movement of the other pair of link-connected arms 84 and 86. Since the oscillatory movement of one rocker arm 86 is out of phase with the oscillatory movement of the other rocker arm, one clutch 82 will be in driving engagement with auger shaft 36 while the other clutch is in an overrunning condition, thus causing substantially continual one-way rotation of shaft 36. As previously mentioned, the rotational speed of drive shaft 34 is preferably constant. The speed of rotation of auger 28 is dependent upon'the extent of swing or oscillatory movement of each rocker arm 86 or, more specifically, the distance of movement of the link-connected and roller-connected ends of the rocker arms. In turn, the extent of swing or oscillatory movement of each rocker arm is dependent upon the amount of tilt of disk 46 relative to shaft 34. In FIGS. 4-6, regulating device 39 is set for maximum auger speed with collar 58 abutting collar 42. As dial knob 74 is rotated, springs 100 will urge collar 58 and thrust bearing member 60 axially away from collar 42 and thus allow the disk to assume a more nearly perpendicular position relative to shaft 34. As disk 46 is permitted to assume a more nearly perpendicular position relative to shaft 34, the extent of movement of arms 86 and 84 would be reduced, thus causing a reduction in the speed of auger 28. When dial knob 74 is turned so that the disk is perpendicularly oriented relative to the axis of shaft 34, rocker arms 86 will experience no oscillatory movement and auger 28 will stop.

ln the described embodiment, we have six parallel material discharging augers 28 and thus there will be six regulating devices 39 (only one shown) located side by side within housing part 32. Each auger 28 will be driven by shaft 34 at a speed correlated to its dial knob setting, and therefore at a material discharge rate correlated to its dial knob setting. If the user of the mixing and grinding apparatus 5 wishes to utilize less than the six augers available to prepare a feed mixture, such as when only four of the six available feed constituents are to be used for a particular feed batch, one or more knobs 74 can be set so that their associated disks 46 are positioned perpendicularly to the axis of shaft 34. For each particular batch of feed, shaft 34 will be rotated at a selected speed which preferably remains substantially constant during the grinding and mixing operation.

It is to be understood that the invention above described is not to be limited to the details herein given, but may be modified within the scope of the appended claims.

What I claim is:

1. A device in association with a drive shaft for regulating the speed of a material discharging means, comprising a rocker arm member having a connector end and a cam follower end, coupler means in operative association between the connector end of said rocker arm member and said material discharging means for effecting movement of said material discharging means upon oscillatory movement of said rocker arm member with the speed of said material discharging means being dependent upon the distance of movement of the connector end of said rocker arm member, power transferring means associated with said drive shaft and having parts rotatable therewith, means for rotating said drive shaft, said rotatable parts including cam means contacted by the cam follower end of said rocker arm member for effecting said oscillatory movement of said rocker arm member upon rotation of said drive shaft, said cam means being shiftable during rotation of said drive shaft to vary the extent of oscillatory swing of said rocker arm member whereby the distance of movement of said connector end can be selectively changed.

2. A device in association with a drive shaft for regulating the speed of a material discharging means, comprising a pair of rocker arm members each having a connector end and a cam follower end, coupler means in operative association betwe'enthe connector endjof each rocker arm member and said material discharging means for effecting movement of said material discharging means upon oscillatory movement of said rocker arm members with the speed of said material discharging means being dependent upon the distance of movement of the connector ends of said rocker arm members, power transferring means associated with said drive shaft and having parts rotatable therewith, said rotatable parts including cam means contacted by the cam follower ends of said rocker arm, members for effecting said oscillatory movement of said rocker arm members upon rotation of said drive shaft, said cam means being shiftable to vary the extent of oscillatory swing of said rocker arm members whereby the distance of movement of said connector ends is changed, means for rotating said drive shaft, said rotatable parts including-a disk carried by said drive shaft for rotation therewith, said disk being tiltable about the axis of said drive shaft and including opposite first and second side faces, said first side face defining said cam means, said rocker arm members being pivotal about a common axis, said cam follower ends contacting said cam means on opposite sides of said drive shaft axis, said power transferring means including means for selectively tilting said disk to vary the extent of oscillatory swing of said rocker arm membersduring rotation of said drive shaft.

3. The speed regulating device of claim 1 wherein said power transferring means includes a disk carried by said drive shaft for rotation therewith, said disk being tiltable about the axis of said drive shaft and including opposite first and second side faces, said first side face defining said cam means, said rocker arm members being pivotal about a common axis, said cam follower ends contacting said cam means on opposite sides of said drive shaft axis, said power transferring means including means for selectively tilting said disk to vary the extent of oscillatory swing of said rocker arm members.

4. The speed regulating device of claim 3 wherein said material discharging means includes a rotary driven member, each coupler means secured to said rotary driven member and being reciprocally actuated upon oscillatory movement of said rocker arm members to produce one-directional rotation of said rotary driven member.

5. The speed'regulating device of claim 4 wherein said material discharging means is an auger.

6. The speed regulating device of claim 3 wherein each cam follower end includes a roller making rolling contact with said cam means.

7. The speed regulating device of clalm'3 wherein said disk tilting means includes a first collar member fixedly carried by said drive shaft and having one side confronting the second side face of said disk, said disk having a central opening through which said drive shaft extends with clearance, means pivotally connecting said disk to said first collar member for permitting said disk to be tilted relative to said drive shaft and the first side face of said disk to be positioned at an angular relationship to said drive shaft axis. I

8. The speed regulating device of claim 7 wherein said disk tilting means includes a second collar member positioned at the opposite side of said first collar memberfrom said disk, said second collar member being movable longitudinally of said drive shaft and including means contacting said disk for causing the disk to be tilted relative to said drive shaft.

9. The speed regulating device of claim wherein said second collar member carries a pin which extends with clearance through a bore in said first collar member and contacts the second side face of said disk spaced from the disks pivot connection to said first collar member, said disk tilting means including means defining a cam member for moving said second collar member along said drive shaft and causing shiftable movement of said pin and a corresponding pivotal movement of said disk relative to said first collar member.

10. The speed regulating deviceof claim 9 wherein said disk tilting means including a thrust bearing means carried by said drive shaft at the opposite side of said second collar member from said first collar member, said bearing means being shiftable along said drive shaft and having first and second race parts, said first race part contacting said second collar member, said cam member contacting said second race part, means for actuating said cam member to cause said bearing means and second collar member to move along said drive shaft.

1 l. The speed regulating device of claim 9 and biasing means maintaining each cam follower in contact with said disk cam means in all operative positions of said disk.

12. The speed regulating device of claim 11 wherein said material discharging means includes a rotary driven member, an actuator arm connected at one end to each coupler means, both said coupler means connected to said driven member and producing correlated one-directional rotative movement of said driven member upon reciprocating movement of each actuator arm, link means connecting the opposite end of each actuator arm to the connector end of a rocker arm member for effecting reciprocating movement of the actuator arm upon oscillatory movement of the rocker arm member, said biasing means constituting a pair of springs each having one end connected to an actuator arm and its other end connected to a rocker arm member between the pivot axis and cam follower end of the arm member.

13. in combination, a plurality of material discharging means, a drive shaft, a speed regulating means drive-connecting each material discharging means to said drive shaft, each speed regulating means including:

a. a disk carried by said drive shaft for rotation therewith, said disk being tiltable about the axis of said drive shaft and having a side face defining a cam surface;

. a pair of parallel rocker arm members each having a connector end and a cam follower end, the cam follower ends of said arm members contacting the cam surface of said disk on opposite sides of said drive shaft axis whereby rotation of said drive shaft with said disk side face disposed at an acute angle to the axis of said drive shaft effects oscillatory movement of said arm members with the connector ends thereof moving in opposite directions;

0. means connecting the connector end of each arm member to a material discharging means for effecting movement of .said material discharging means upon oscillatory movement of said arm members with the speed of movement of said material discharging means being dependent upon the extent of oscillatory movement of each arm member; and

. means for selectively tilting said disk to vary the angle said disk side face makes with said drive shaft axis and thereby vary the extent of oscillatory movement of said arm members.

14. The combination of claim 13 wherein each disk has a central opening, said drive shaft extending through the central opening in each disk, said means for selectively tilting each disk being independently operable.

15. The combination of claim 14 and means for rotating said drive shaft, said means for selectively tilting each disk being operable during rotation of said drive shaft. 

1. A device in association with a drive shaft for regulating the speed of a material discharging means, comprising a rocker arm member having a connector end and a cam follower end, coupler means in operative association between the connector end of said rocker arm member and said material discharging means for effecting movement of said material discharging means upon oscillatory movement of said rocker arm member with the speed of said material discharging means being dependent upon the distance of movement of the connector end of said rocker arm member, power transferring means associated with said drive shaft and having parts rotatable therewith, means for rotating said drive shaft, said rotatable parts including cam means contacted by the cam follower end of said rocker arm member for effecting said oscillatory movement of said rocker arm member upon rotation of said drive shaft, said cam means being shiftable during rotation of said drive shaft to vary the extent of oscillatory swing of said rocker arm member whereby the distance of movement of said connector end can be selectively changed.
 2. A device in association with a drive shaft for regulating the speed of a material discharging means, comprising a pair of rocker arm members each having a connector end and a cam follower end, coupler means in operative association between the connector end of each rocker arm member and said material discharging means for effecting movement of said material discharging means upon oscillatory movement of said rocker arm members with the speed of said material discharging means being dependent upon the distance of movement of the connector ends of said rocker arm members, power transferring means associated with said drive shaft and having parts rotatable therewith, said rotatable parts including cam means contacted by the cam follower ends of said rocker arm members for effecting said oscillatory movement of saId rocker arm members upon rotation of said drive shaft, said cam means being shiftable to vary the extent of oscillatory swing of said rocker arm members whereby the distance of movement of said connector ends is changed, means for rotating said drive shaft, said rotatable parts including a disk carried by said drive shaft for rotation therewith, said disk being tiltable about the axis of said drive shaft and including opposite first and second side faces, said first side face defining said cam means, said rocker arm members being pivotal about a common axis, said cam follower ends contacting said cam means on opposite sides of said drive shaft axis, said power transferring means including means for selectively tilting said disk to vary the extent of oscillatory swing of said rocker arm members during rotation of said drive shaft.
 3. The speed regulating device of claim 1 wherein said power transferring means includes a disk carried by said drive shaft for rotation therewith, said disk being tiltable about the axis of said drive shaft and including opposite first and second side faces, said first side face defining said cam means, said rocker arm members being pivotal about a common axis, said cam follower ends contacting said cam means on opposite sides of said drive shaft axis, said power transferring means including means for selectively tilting said disk to vary the extent of oscillatory swing of said rocker arm members.
 4. The speed regulating device of claim 3 wherein said material discharging means includes a rotary driven member, each coupler means secured to said rotary driven member and being reciprocally actuated upon oscillatory movement of said rocker arm members to produce one-directional rotation of said rotary driven member.
 5. The speed regulating device of claim 4 wherein said material discharging means is an auger.
 6. The speed regulating device of claim 3 wherein each cam follower end includes a roller making rolling contact with said cam means.
 7. The speed regulating device of claim 3 wherein said disk tilting means includes a first collar member fixedly carried by said drive shaft and having one side confronting the second side face of said disk, said disk having a central opening through which said drive shaft extends with clearance, means pivotally connecting said disk to said first collar member for permitting said disk to be tilted relative to said drive shaft and the first side face of said disk to be positioned at an angular relationship to said drive shaft axis.
 8. The speed regulating device of claim 7 wherein said disk tilting means includes a second collar member positioned at the opposite side of said first collar member from said disk, said second collar member being movable longitudinally of said drive shaft and including means contacting said disk for causing the disk to be tilted relative to said drive shaft.
 9. The speed regulating device of claim 8 wherein said second collar member carries a pin which extends with clearance through a bore in said first collar member and contacts the second side face of said disk spaced from the disk''s pivot connection to said first collar member, said disk tilting means including means defining a cam member for moving said second collar member along said drive shaft and causing shiftable movement of said pin and a corresponding pivotal movement of said disk relative to said first collar member.
 10. The speed regulating device of claim 9 wherein said disk tilting means including a thrust bearing means carried by said drive shaft at the opposite side of said second collar member from said first collar member, said bearing means being shiftable along said drive shaft and having first and second race parts, said first race part contacting said second collar member, said cam member contacting said second race part, means for actuating said cam member to cause said bearing means and second collar member to move along said drive shaft.
 11. The speed regulating device of claim 9 aNd biasing means maintaining each cam follower in contact with said disk cam means in all operative positions of said disk.
 12. The speed regulating device of claim 11 wherein said material discharging means includes a rotary driven member, an actuator arm connected at one end to each coupler means, both said coupler means connected to said driven member and producing correlated one-directional rotative movement of said driven member upon reciprocating movement of each actuator arm, link means connecting the opposite end of each actuator arm to the connector end of a rocker arm member for effecting reciprocating movement of the actuator arm upon oscillatory movement of the rocker arm member, said biasing means constituting a pair of springs each having one end connected to an actuator arm and its other end connected to a rocker arm member between the pivot axis and cam follower end of the arm member.
 13. In combination, a plurality of material discharging means, a drive shaft, a speed regulating means drive-connecting each material discharging means to said drive shaft, each speed regulating means including: a. a disk carried by said drive shaft for rotation therewith, said disk being tiltable about the axis of said drive shaft and having a side face defining a cam surface; b. a pair of parallel rocker arm members each having a connector end and a cam follower end, the cam follower ends of said arm members contacting the cam surface of said disk on opposite sides of said drive shaft axis whereby rotation of said drive shaft with said disk side face disposed at an acute angle to the axis of said drive shaft effects oscillatory movement of said arm members with the connector ends thereof moving in opposite directions; c. means connecting the connector end of each arm member to a material discharging means for effecting movement of said material discharging means upon oscillatory movement of said arm members with the speed of movement of said material discharging means being dependent upon the extent of oscillatory movement of each arm member; and d. means for selectively tilting said disk to vary the angle said disk side face makes with said drive shaft axis and thereby vary the extent of oscillatory movement of said arm members.
 14. The combination of claim 13 wherein each disk has a central opening, said drive shaft extending through the central opening in each disk, said means for selectively tilting each disk being independently operable.
 15. The combination of claim 14 and means for rotating said drive shaft, said means for selectively tilting each disk being operable during rotation of said drive shaft. 